Here’s a quick chart I made that’s probably confusing to read

Yes, this is a cultural matter. In troll culture they don’t have parents, there is no direct line of biology for them to follow. It also has to do with troll genetics, while it’s easily seen that each beta kid is made from two of the alpha kids with the trolls it’s more difficult.  We don’t know the specifics of the trolls’ ectobiology but it’s entirely likely that each one of Meenah’s group of trolls could have been made through a mixture of three trolls, or even a mixture of all the trolls with the one that contributed the most genetics sharing the symbol. There are other theories about troll ectobioloy out there but overall troll biology is much more complicated then human biology.

Dirk, Roxy, Jane, and Jake are clones of their pre-scratch selves while John and Jade were made with Jake and Jane’s ectoslime and Rose and Dave were created by mixing Roxy and Dirk’s ectoslime

Yes, Jake is biologically John’s father.

As far as I know we still call her PM.  The only reason I refer to ring wearing Jack as something different is because there’s multiple Jack’s running around.

No, Roxy and Dirk are not related, neither are Jane and Jake.

“Sure, it is fun to imagine what it would be like to run wild with a pack of wolves, or purr and frolic with a litter of kittens, but dressing up as an animal just seems ridiculous. It would still just be a silly girl draped in a raggedy synthetic tufty piece of crap…”  

Jade doesn’t like fursuits, she is not wearing a fursuit though, she literally is part animal.  And she thinks “ ANTHROPOMORPHIC FAUNA are really cute and enchanting…”

No because Vriska no longer has a metal arm, she got a real arm back upon ascending to God Tier via her Quest Cocoon

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He got exploded, he’s dead as far as we know.

Your dreamself will begin to die as well unless someone kisses your corpse in time.